/*广告页*/
.header{
    height: 44px;
    line-height: 44px;
    text-align: center;
}

.content{
    background: url(../img/advertisement-bg.jpg);
    background-size: 1280px;
    background-position: center top;
}

/*倒计时*/
.count-down{
    position: fixed;
    right: 14px;
    top: 74px;
    width: 106px;
    height: 40px;
    text-align: center;
    line-height: 40px;
    border-radius: 20px;
    border: 1px solid gray;
}

/*标语*/
.slogan{
    position: fixed;
    bottom: 200px;
    left: 50%;
    height: 40px;
    font-size: 30px;
    color: white;
    transform: translateX(-50%);
    animation: slogandown 2s linear forwards;
}

@keyframes slogandown{
    0%{
        opacity: 0;
        bottom: 200px;
    }
    50%{
        opacity: 0.5;
        transform: translateX(-50%) scale(2);
    }
    100%{
        opacity: 1;
        bottom: 100px;

    }
}